Can someone explain to me the tool height and touch probe thing. I am currently using a Littlemachine shop manual edge finder for x and y. For Z i am using zigzag paper. once they all are zeroed i zero my DRO. am i doing it wrong? will this touch probe thing make it easier to do the same thing. I was talking to another guy and he said to use an electronic edge finder without the battery. With out the battery the tip is isolated and can be used as a probe i guess. I guess i do not really understand the point or the operation enough to event field the questions i want answered.